Astronomy and Astrophysics – Astrophysics
Scientific paper
Feb 1978
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978ap%26ss..53..507f&link_type=abstract
Astrophysics and Space Science, vol. 53, no. 2, Feb. 1978, p. 507-513.
Astronomy and Astrophysics
Astrophysics
5
Cosmic Rays, Magnetic Fields, Particle Density (Concentration), Turbulent Flow, Diffusion Coefficient, Distribution Functions, Lines Of Force, Pitch (Inclination), Transport Properties
Scientific paper
The distribution function of cosmic rays streaming perpendicular to the mean magnetic field in a turbulent medium is reexamined. Urch's (1977) discovery that in quasi-linear theory, the flux is due to particles at 90 deg pitch angle is discussed and shown to be consistent with previous formulations of the theory. It is pointed out that this flux of particles at 90 deg cannot be arbitrarily set equal to zero, and hence the alternative theory which proceeds from this premise is dismissed. A further, basic inconsistency in Urch's transport equation is demonstrated, and the connection between quasi-linear theory and compound diffusion is discussed.
Forman Miriam A.
Jokipii Randy J.
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